Worksheet: Addition Patterns

In this worksheet, we will practice identifying, describing, and making addition patterns using methods such as addition tables.

Q1:

Complete the pattern: 9=9,9+11=20,9+11+13=33,,.

  • A9+11+13+15=48, 9+11+13+15+17=65
  • B9+11+13+14=47, 9+11+13+15+17=65
  • C9+11+13+15=48, 9+11+13+15+16=64
  • D9+11+13+14=47, 9+11+13+14+15=62

Q2:

Two students are making a number pattern that starts at 3 with the rule add 5.

Hannah notices that the units digits are always 3 or 8 and that it follows a repeating pattern: 3, 8, 3, 8. She says that the numbers in the shaded boxes will always have 3 in the units place. Do you agree? Why?

  • Ayes, because 3+5=8
  • Bno, because 5+5=10, and when you add 10 the units digit will change
  • Cyes, because 5+5=10, and the units digit does not change when you add 10
  • Dno, because 3+5=8
  • Eno, because 8+5=13

Q3:

Noah starts a pattern with the number 9, and his pattern rule is adding 10. Choose Noah’s pattern.

  • A10, 19, 28, 37
  • B10, 20, 30, 40
  • C9, 10, 11, 12
  • D9, 19, 29, 39
  • E9, 29, 49, 69

Q4:

Observe the number pattern 5, 26, 47, 68, 89.

Fill in the blank: The numbers of the pattern from left to right.

  • Adecrease
  • Bincrease

What is the rule of the number pattern?

  • AAdding 21
  • BMultiplying by 21
  • CAdding 20
  • DSubtracting 20
  • ESubtracting 21

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